diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -1853,8 +1853,10 @@
     }
     if (tty) {
         tmp = _PyObject_CallMethodId(fout, &PyId_fileno, "");
-        if (tmp == NULL)
+        if (tmp == NULL) {
             PyErr_Clear();
+            tty = 0;
+        }
         else {
             fd = PyLong_AsLong(tmp);
             Py_DECREF(tmp);